The line used to show the power figures at that particular RPM can be a bit deceiving for the AFR.

The car actually ran closer to 12's throughout the run and straight through redline. We had a slight issue of the sniffer coming out at redline. Basically we didn't want to screw it on too tight and damage the exhaust tips on the car.

Take a look at the AFR a few hundred RPM earlier, it maintained that AFR mixture to redline which we confirmed with other tools on the dyno and the street.